CVEvulnerability

CVE-2007-4321

6.8 MEDIUM Published 2007-08-14 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2007-08-14
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P

Description

fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a client protocol version identification containing an IP address string, a different vector than CVE-2006-6302.

Affected configurations

• fail2ban fail2ban 0.8

References